Fullerton is an 'L' station on the CTA's North Side Main Line. It is served at all times by Red and Brown Line trains; Purple Line Express trains also stop at the station during weekday rush hours. It is an elevated station with two island platforms, serving four tracks, located in the Lincoln Park neighborhood in Chicago, Illinois. Brown and Purple Line trains share the outer tracks while Red Line trains run on the inner tracks. As well as being an important transfer station, the station serves the Lincoln Park Campus of DePaul University.